Here's the thing about these low rates.
My comparison was to the post-9/11 discounts. 9/11 was a worst-in-70-years terrorist event.
Discounts from 2007-2011/12 were in the aftermath of a worst-in-80-years economic crisis.
What's the "worst-in-x-years" event that's driving these discounts?
If this is just business-as-usual, then I don't understand how the post-crises rates were not lower, when Disney was legitimately more worried. Labor and other costs have gone up since then.
I haven't done the numbers, but I'm pretty sure that food and ticket prices have risen about the same. Is it that Disney thinks those and merch will make up the difference?
I'd say consumer confidence/sentiment are the most important indicators with regard to travel spending, and the last few months is the highest those indexes have been since pre-9/11. (Which also helps explain why DCL and Anaheim hotel prices have been trending upward, at least in part.)
I do think there's more to the story, though--you only have to look forward to October to see a return of exorbitant pricing. WDW has done a pretty good job of (re)distributing crowds throughout its calendar year by way of discounting and special events, but this is the second consecutive year that they've failed to hit their targets in the summer.
Having that happen once can be explained away as a one off--blame foreign economies or the introduction of dynamic ticket pricing. Two years in a row? Not so much.